Fuse



Feb. 17, 1931. A. G. sTElNMAYr-:R 1-79213 FUSE Filed Nov. 30, 19254 ai fl/ '/"0 lf we! l] Q/Alwm E tgmmayn Patented Feb. 17, 1931 UNITED STATES PATENT OFFICE ALWIN G. STEINMAYER, OF MILWAUKEE, WISCONSIN, ASSIGNOR, BY MESNE ASSIGN- MENTS, T LINE MATERIAL 'COMPA NY, A CORPORATION 0F DELAWARE FUSE Application led November 30, 1925. Serial No. 72,162.

It is a general object of Vthis invention to simplify and improve the construction of fuses of that type especially designed for interrupting high-voltage circuits upon the occurrence of excessive overloafds.

Another' object of this invention resides in the provision of an improved fuse construction, wherein the terminal vmembers with which the fuse carrying terminal engaging elements are engageable are mounted on the inner ends of the lead-in insulators, whereby but two insulating members are requiredyin the entire construction. f

A further object of this invention resides in the provision of an improved device of the character described, wherein the lead-in insulators and terminal members are fixed upon a single mounting plate ywhich is readily removably secured to the rear wall of the fuse housing to facilitate their ready removal as a single unit.

This invention has as a still further object the provision of an improvedY and simplified fuse unit in which the fuse element is enclosed throughout its entire length and the gases generated by the volatilization of the elements vented outwardly of the housing.

With the above and other objects in View which will appear as the description proceeds,

my invention resides in the novel construetion, combination Aand arrangement of parts substantially as hereinafter described and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the herein-disclosed invention may be made as come within the scope of the claims,

In the accompanying drawing, I have illustrated one'complete example of the physical embodiment of my invention constructed according to the best modeY I have so far de-` vised forl the practical application of the principles thereof, and in which: l

The single'view illust-rates afuse switch construction embodying my invention, the

housing being in vertical section and parts of the fuse proper being broken away,

In the drawing, the numeral 5 designates a boxer housing having apertures 6 in its rear wall ftiiroughf which project tubular lead-in Aabie cap threaded on a boss insulators 8 `fixed, as at 9 in a mounting plate l0, secured to the bof; rear wall by bolts ll.

The insulators 8 have terminal members l2 mounted on their inner ends that carry switch terr .fail members i3 of the clip type adapted D; to receive the terminal engaging elements or contacts le and l5 oi a fuse 1G. The terminals 1Q have binding screws or other means l? for electrically connecting the lilies 18, of a circuit in which the device is incorporated 0;,

The mounting l() is made of any suitable material and is flanged, as at 19, where it receives the insulators 8, and the lianges have recesses or grooves 2O in their inner surfaces to provide a .firm anchor for the cement c5 or other means 9 employed to secure the ine sulators in place. As will be readily apparent, the mounting 10 and the insulators and terminals carried thereby may be bodily removed 'from the housing by re noving the To bolts l1, moving the plate 10 from the wall until the fianges 19 disengage the openings (i, shifting the mounting longitudinally to align one terminal 13 with its adjacent opening7 then withdrawing the aligned terminal from its opening 6 and shifting the mounting longitudinally in an opposite direction to aligi'i the other terminal with its opening and then withdrawing the same. rIhis construction greatly simplifies the construction of the housing and facilitates repairs or replacement of the parts.

r[he i'nse 16 consists of an clon ended tube 2l of suitable insulat flu() passed. through and extended beyond other terminal engaging element 15. p The threads 22 forni the n'ieans for mounting the fl-Vf elemen on the tube 2l, and the element l5 is fixed r ii the tube by binding b its adapt ed to draw the split en the clel'nen; therabout. Tl

u ae eiement l has a its end whiel is nominally closed a remov- E27 formed on the element, the cap 26 providing means 'for damping the upper end E28 of a fuse elemen` 29 in electricalconnection with the terminal element I4; The .fuse elementv 29 his a re- 100 duced cross-sectional area adj aeent its end 28 and extends through the length of the tube 13 and outwardly of its loiver end and its end portion 31 is 'folded back along theY exterior of the tube andV clamped Within the channel 32 ot the enlarged or flanged portion 33 of the element 15 bya sleeve orrcollar 341 threaded into flange 33.

The lower end et the tube 21 projecting beyond theA terminal element 15 extends below the bottom 35 et the box through the opening 36 thereof to permit the venting of thetube outwardly oi' theboX. A second tube 37 surrounds the extended end of the tube 16 and the end portion 31 of the fuse and iiied'to. the sleeve or collar 311V by threads or other means 38, the tube 37 having its lower end extended beyond the lower end ot the other tube.

The fuse as :i unit is mounted one blo other means 39, carried by a door d0., cl 'the outer face of 'the bor so 'that when die door is opened, the fuse unit is carried there with to disengagethe elements 14 and 15 from the terminals 12 and 13. rEhe bloclr 39 is connected with the door by a Wing nut arrangementv 11 so that the door li() may be opened Without carrying the fuse unit therewith.

VllVhat Ielaim as my invention is:

- 1. ln an electrical appliance of the character described, a housing having a plurality et spaced apertures in one Wall thereof, a plate member removablysecured to the apertured Wall of the housing, and having openings therein registering with said apertures, inwardly struck 'danges surround-ing the plate member openings and adapted to jfit within the housing apertures, and lead-in insulators lined in the openings of the plate member and adapted to have their yinner en ds located Within the housing interior and their outcrcnds extended outwardly thereof.

2. Inl anV electrical appliance of the char- V acter described, a housing having;V a plurality of spaced apertures in one Wall thereof, a plate member removably secured to the aper# tured wall of the housing and having openings thereinregistering Vwith said aperturesv` inwardly struck flanges surrounding the plate member openings andr adapted to tit Within the box apertures, lead-in insulators. secured in the openings of the plate member. rand adapted to have their inner Ylocated Withinlthe housing interior and their outer ends extended.outwardly thereof, and terminal elements lined to the inner ends-oi1 the lead-in insulators. Y 'Y 3. In an electrical Vapplianee'of the charac.- ter described, a housinghaving aj plurality oi: spaced aperaturesin one Wall` thereof.. a plate member having operrnffs` therein. registering v with said apertures, means removably sec-ure ingtheplate member o' the 'aperthredwall of 's meuntcdnr the', housing, learlei .enla

the'openings of the plate member and projected into the housing through the apertures therein, and terminal members fixed to the inner ends of the lead-in insulators and projected therebeyond in opposite directions to entendv beyond the opposed diametrie points of the housingapertures, the apertures in the housing Wall being greater than the diameter of the lead-n insulators. whereby .the plate carrying Ythe insulators may be shiftedin one direction att-erv its securing meanshas been removed Ato align one terminal member with its Wall aperture and then shifted inthe opposite directionv to align the other terminal member with its Wall aperture, whereby to facilitate the removalv of the plate, lead-in. in-

sulators and terminal members asfan entirety.

4;. In combination with a. fuse having contacts, a housing having'v an. apertured wall, a plate member removably secured to the apertu redV Wal. l; and-haring epaced.- openi g in tubu lead-in insu laters fixed in the plate member cfenings. vith their inner ends prejectedl through the apertured wall into the housing `and their buter` enc entend-ed out.- uardly. from the plate member, and terminal members fixed to theV inner ends of the tubular lead-in insulators', said terminal members. being adapted to engage the fuse contacts.' f

5.,I.n\ combination With a fuse having conf tact-s, a, housing, terminals Within the housingv adapted to, engage the fuse contacts to support the tuseand be electrically bridged thereby, and means. detachably connected with the housing and having both terminals rigidly c onnectfedj` therewith in predetermined fined relation, to each other to. insure proper electrical Contact between Ythe fuse contacts and the terminals, whereby the terminalsaud their mounting means forni ya unit substanT tially liii-.dependent of' the housing to permit the terminaljslto be removed fromthe housing Without .distiufbing their iXed relationship.l j f.

6. In combination with a fuse having contacts,"a housingtermina ls Within thehousing adaptedito engage the fuse contacts to support the LAi'use and be electrically"bridged thereby, and.. `means mounting the terminals in pr determined fixed relation to each other including tubular lead 'Y 'vnsulators to which thej terminals secured and through which cenfluatole enter the. housingto 'be Y Connected the terminale, and means conne theV insulators. Said heee-nsv Ybell-"re detachabllyconnected with the housing Whereby the terminalsand their mounting` means form. a unit substantiall independent of the housing? and the terminals.: are removable from the housing Without disturbi-ng.

liXed relationship;

In. testin there tony whereetfa I. al-nxz my' 'SiOn-ature. 

